Expands collapsed threads and then likes every comment on the current Facebook page

likeAllComments.js

(function expandThreads(){
	var count = 0;
	var els = document.querySelectorAll('.UFIReplySocialSentenceLinkText, .UFIPagerLink');
	console.log("Expanding", els.length, "threads");
	for(var i = 0; i < els.length; i++){
		if(els[i].innerText.indexOf("Hide") === -1){
			els[i].click();
			count++;
		}
	}
	if(count)
		setTimeout(expandThreads, 250);
	else{
		els = document.querySelectorAll('.UFILikeLink');
		var delay = els.length < 50 ? 100 : 1000; // TODO: Find more accurate numbers to use here
		console.log("Liking", els.length, "comments");
		(function likeComment(i){
			if(els[i].innerText === "Like")
				els[i].click();
			if(i < els.length - 1)
				setTimeout(likeComment.bind(this, i + 1), delay);
			else
				console.log("Done");
		})(0);
	}
})();